bjoernager/rust
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Rollup merge of #103760 - petrochenkov:macimp, r=cjgillot

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resolve: Turn the binding from `#[macro_export]` into a proper `Import`

Continuation of https://github.com/rust-lang/rust/pull/91795.

```rust
#[macro_export]
macro_rules! m { /*...*/ }
```
is desugared to something like
```rust
macro_rules! m { /*...*/ } // Non-modularized macro_rules item

pub use m; // It's modularized reexport
```

This PR adjusts the internal representation to better match this model.
This commit is contained in:
Dylan DPC 2022-11-01 22:01:36 +05:30 • committed by GitHub
commit 68afa32985
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11 changed files with 238 additions and 165 deletions
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36
compiler/rustc_resolve/src/diagnostics.rs
View file

@ -190,12 +190,12 @@ impl<'a> Resolver<'a> {
ModuleKind::Block => "block",
};
let old_noun = match old_binding.is_import() {
let old_noun = match old_binding.is_import_user_facing() {
true => "import",
false => "definition",
};
let new_participle = match new_binding.is_import() {
let new_participle = match new_binding.is_import_user_facing() {
true => "imported",
false => "defined",
};
@ -226,7 +226,7 @@ impl<'a> Resolver<'a> {
true => struct_span_err!(self.session, span, E0254, "{}", msg),
false => struct_span_err!(self.session, span, E0260, "{}", msg),
},
_ => match (old_binding.is_import(), new_binding.is_import()) {
_ => match (old_binding.is_import_user_facing(), new_binding.is_import_user_facing()) {
(false, false) => struct_span_err!(self.session, span, E0428, "{}", msg),
(true, true) => struct_span_err!(self.session, span, E0252, "{}", msg),
_ => struct_span_err!(self.session, span, E0255, "{}", msg),
@ -248,14 +248,18 @@ impl<'a> Resolver<'a> {
// See https://github.com/rust-lang/rust/issues/32354
use NameBindingKind::Import;
let can_suggest = |binding: &NameBinding<'_>, import: &self::Import<'_>| {
!binding.span.is_dummy()
&& !matches!(import.kind, ImportKind::MacroUse | ImportKind::MacroExport)
};
let import = match (&new_binding.kind, &old_binding.kind) {
// If there are two imports where one or both have attributes then prefer removing the
// import without attributes.
(Import { import: new, .. }, Import { import: old, .. })
if {
!new_binding.span.is_dummy()
&& !old_binding.span.is_dummy()
&& (new.has_attributes || old.has_attributes)
(new.has_attributes || old.has_attributes)
&& can_suggest(old_binding, old)
&& can_suggest(new_binding, new)
} =>
{
if old.has_attributes {
@ -265,10 +269,10 @@ impl<'a> Resolver<'a> {
}
}
// Otherwise prioritize the new binding.
(Import { import, .. }, other) if !new_binding.span.is_dummy() => {
(Import { import, .. }, other) if can_suggest(new_binding, import) => {
Some((import, new_binding.span, other.is_import()))
}
(other, Import { import, .. }) if !old_binding.span.is_dummy() => {
(other, Import { import, .. }) if can_suggest(old_binding, import) => {
Some((import, old_binding.span, other.is_import()))
}
_ => None,
@ -353,7 +357,7 @@ impl<'a> Resolver<'a> {
}
}
}
ImportKind::ExternCrate { source, target } => {
ImportKind::ExternCrate { source, target, .. } => {
suggestion = Some(format!(
"extern crate {} as {};",
source.unwrap_or(target.name),
@ -1683,7 +1687,7 @@ impl<'a> Resolver<'a> {
let a = if built_in.is_empty() { res.article() } else { "a" };
format!("{a}{built_in} {thing}{from}", thing = res.descr())
} else {
let introduced = if b.is_import() { "imported" } else { "defined" };
let introduced = if b.is_import_user_facing() { "imported" } else { "defined" };
format!("the {thing} {introduced} here", thing = res.descr())
}
}
@ -1742,10 +1746,10 @@ impl<'a> Resolver<'a> {
/// If the binding refers to a tuple struct constructor with fields,
/// returns the span of its fields.
fn ctor_fields_span(&self, binding: &NameBinding<'_>) -> Option<Span> {
if let NameBindingKind::Res(
Res::Def(DefKind::Ctor(CtorOf::Struct, CtorKind::Fn), ctor_def_id),
_,
) = binding.kind
if let NameBindingKind::Res(Res::Def(
DefKind::Ctor(CtorOf::Struct, CtorKind::Fn),
ctor_def_id,
)) = binding.kind
{
let def_id = self.parent(ctor_def_id);
let fields = self.field_names.get(&def_id)?;
@ -1789,7 +1793,9 @@ impl<'a> Resolver<'a> {
next_ident = source;
Some(binding)
}
ImportKind::Glob { .. } | ImportKind::MacroUse => Some(binding),
ImportKind::Glob { .. } | ImportKind::MacroUse | ImportKind::MacroExport => {
Some(binding)
}
ImportKind::ExternCrate { .. } => None,
},
_ => None,